Offered is an NOS headlight switch tagged as a 566Z, and marked for either '37-'38, or '38-'39 Nash and Lafayette. Please compare to your existing switch to confirm application. This is my last one, and it has the auxiliary fuse terminal and clip broken off. The switch terminals are unaffected. Not sure what the extra fuse terminal is for, but I'm sure a replacement can be improvised. The switch has been tested OK. Item comes as shown.